[MIPS] Sibyte: Build fixes / dead code removal.

[powerpc.git] / arch / mips / sibyte / sb1250 / irq.c

diff --git a/arch/mips/sibyte/sb1250/irq.c b/arch/mips/sibyte/sb1250/irq.c
index 7659174..eac9065 100644 (file)
--- a/arch/mips/sibyte/sb1250/irq.c
+++ b/arch/mips/sibyte/sb1250/irq.c
@@ -236,41 +236,6 @@ void __init init_sb1250_irqs(void)
 }
 
 
-static irqreturn_t  sb1250_dummy_handler(int irq, void *dev_id)
-{
-       return IRQ_NONE;
-}
-
-static struct irqaction sb1250_dummy_action = {
-       .handler = sb1250_dummy_handler,
-       .flags   = 0,
-       .mask    = CPU_MASK_NONE,
-       .name    = "sb1250-private",
-       .next    = NULL,
-       .dev_id  = 0
-};
-
-int sb1250_steal_irq(int irq)
-{
-       struct irq_desc *desc = irq_desc + irq;
-       unsigned long flags;
-       int retval = 0;
-
-       if (irq >= SB1250_NR_IRQS)
-               return -EINVAL;
-
-       spin_lock_irqsave(&desc->lock, flags);
-       /* Don't allow sharing at all for these */
-       if (desc->action != NULL)
-               retval = -EBUSY;
-       else {
-               desc->action = &sb1250_dummy_action;
-               desc->depth = 0;
-       }
-       spin_unlock_irqrestore(&desc->lock, flags);
-       return 0;
-}
-
 /*
  *  arch_init_irq is called early in the boot sequence from init/main.c via
  *  init_IRQ.  It is responsible for setting up the interrupt mapper and
@@ -342,8 +307,6 @@ void __init arch_init_irq(void)
        __raw_writeq(tmp, IOADDR(A_IMR_REGISTER(0, R_IMR_INTERRUPT_MASK)));
        __raw_writeq(tmp, IOADDR(A_IMR_REGISTER(1, R_IMR_INTERRUPT_MASK)));
 
-       sb1250_steal_irq(K_INT_MBOX_0);
-
        /*
         * Note that the timer interrupts are also mapped, but this is
         * done in sb1250_time_init().  Also, the profiling driver
@@ -367,7 +330,6 @@ void __init arch_init_irq(void)
                __raw_writeq(M_DUART_IMR_BRK,
                             IOADDR(A_DUART_IMRREG(kgdb_port)));
 
-               sb1250_steal_irq(kgdb_irq);
                __raw_writeq(IMR_IP6_VAL,
                             IOADDR(A_IMR_REGISTER(0,
                                                   R_IMR_INTERRUPT_MAP_BASE) +
@@ -400,43 +362,27 @@ static void sb1250_kgdb_interrupt(void)
 
 #endif         /* CONFIG_KGDB */
 
-static inline void sb1250_timer_interrupt(void)
-{
-       int cpu = smp_processor_id();
-       int irq = K_INT_TIMER_0 + cpu;
-
-       irq_enter();
-       kstat_this_cpu.irqs[irq]++;
-
-       write_seqlock(&xtime_lock);
-
-       /* ACK interrupt */
-       ____raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
-                      IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG)));
-
-       /*
-        * call the generic timer interrupt handling
-        */
-       do_timer(1);
+extern void sb1250_mailbox_interrupt(void);
 
-       write_sequnlock(&xtime_lock);
+static inline void dispatch_ip2(void)
+{
+       unsigned int cpu = smp_processor_id();
+       unsigned long long mask;
 
        /*
-        * In UP mode, we call local_timer_interrupt() to do profiling
-        * and process accouting.
-        *
-        * In SMP mode, local_timer_interrupt() is invoked by appropriate
-        * low-level local timer interrupt handler.
+        * Default...we've hit an IP[2] interrupt, which means we've got to
+        * check the 1250 interrupt registers to figure out what to do.  Need
+        * to detect which CPU we're on, now that smp_affinity is supported.
         */
-       local_timer_interrupt(irq);
-
-       irq_exit();
+       mask = __raw_readq(IOADDR(A_IMR_REGISTER(cpu,
+                                 R_IMR_INTERRUPT_STATUS_BASE)));
+       if (mask)
+               do_IRQ(fls64(mask) - 1);
 }
 
-extern void sb1250_mailbox_interrupt(void);
-
 asmlinkage void plat_irq_dispatch(void)
 {
+       unsigned int cpu = smp_processor_id();
        unsigned int pending;
 
        /*
@@ -454,7 +400,7 @@ asmlinkage void plat_irq_dispatch(void)
        if (pending & CAUSEF_IP7) /* CPU performance counter interrupt */
                do_IRQ(MIPS_CPU_IRQ_BASE + 7);
        else if (pending & CAUSEF_IP4)
-               sb1250_timer_interrupt();
+               do_IRQ(K_INT_TIMER_0 + cpu);    /* sb1250_timer_interrupt() */
 
 #ifdef CONFIG_SMP
        else if (pending & CAUSEF_IP3)
@@ -466,21 +412,8 @@ asmlinkage void plat_irq_dispatch(void)
                sb1250_kgdb_interrupt();
 #endif
 
-       else if (pending & CAUSEF_IP2) {
-               unsigned long long mask;
-
-               /*
-                * Default...we've hit an IP[2] interrupt, which means we've
-                * got to check the 1250 interrupt registers to figure out what
-                * to do.  Need to detect which CPU we're on, now that
-                * smp_affinity is supported.
-                */
-               mask = __raw_readq(IOADDR(A_IMR_REGISTER(smp_processor_id(),
-                                             R_IMR_INTERRUPT_STATUS_BASE)));
-               if (mask)
-                       do_IRQ(fls64(mask) - 1);
-               else
-                       spurious_interrupt();
-       } else
+       else if (pending & CAUSEF_IP2)
+               dispatch_ip2();
+       else
                spurious_interrupt();
 }